1 files changed, 62 insertions, 0 deletions
diff --git a/private/crt32/mbstring/mbsnbcnt.c b/private/crt32/mbstring/mbsnbcnt.c
new file mode 100644
index 000000000..196eb02c7
--- /dev/null
+++ b/private/crt32/mbstring/mbsnbcnt.c
@@ -0,0 +1,62 @@
+/*** 
+*mbsnbcnt.c - Returns byte count of MBCS string
+*
+*	Copyright (c) 1987-1992, Microsoft Corporation.  All rights reserved.
+*
+*Purpose:
+*	Returns byte count of MBCS string
+*
+*Revision History:
+*	11-19-92  KRS	Ported from 16-bit sources.
+*
+*******************************************************************************/
+
+#ifdef _MBCS
+#include <cruntime.h>
+#include <mbdata.h>
+#include <mbctype.h>
+#include <mbstring.h>
+
+
+/*** 
+* _mbsnbcnt - Returns byte count of MBCS string
+*
+*Purpose:
+*	Returns the number of bytes between the start of the supplied
+*	string and the char count supplied.  That is, this routine
+*	indicates how many bytes are in the first "ccnt" characters
+*	of the string.
+*
+*Entry:
+*	unsigned char *string = pointer to string
+*	unsigned int ccnt = number of characters to scan
+*
+*Exit:
+*	Returns number of bytes between string and ccnt.
+*
+*	If the end of the string is encountered before ccnt chars were
+*	scanned, then the length of the string in bytes is returned.
+*
+*Exceptions:
+*
+*******************************************************************************/
+
+size_t _CRTAPI1 _mbsnbcnt(string, ccnt)
+const unsigned char *string;
+size_t ccnt;
+{
+        unsigned char *p;
+
+	for (p = (char *)string; (ccnt-- && *p); p++) {
+
+		if (_ISLEADBYTE(*p)) {
+                        if (*++p == '\0') {
+                                --p;
+                                break;
+                        }
+                }
+        }
+
+	return ((size_t) ((char *)p - (char *)string));
+}
+#endif	/* _MBCS */